[][openwrt][mt7988][tops: update firmware to support L2TP over IPsec]

[Description]
Change TOPS firmware to cooperate with latest TOPS driver.
The latest firmware add the ability to support L2TP over IPsec.

[Release-log]
N/A

Change-Id: Iaeb48969be2312d93763431d3b94e9f9dbb97721
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7957160
2 files changed